Boring-machine



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J. ERNST.

BORING MACHINE,

Noi 342,688. Patented May 25, 1886. l

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J. ERNST.

BORING MACHINE. No. 342,688. Patented May 25, 1886.

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Nrrmo STATES PATENT vTrice.

JOHN ERNST, OF BAY CITY, MICHIGAN.

BomNG-MAcl-HNE..

SPECIFICATION forming part; of Letters Patent No. 342,688, dated May 25,1886.

Application tiled September 28, 1885.

To all whom it may concern:

Be it known thatI, JOHN ERNST, a citizen of the United States, residingat Bay City, in the county of Bay and State of Michigan, have inventedcertain new and useful ImprovementsA in Boring-lilaehines; and I dodeclare the following to be a full,clear, and exact description of theinvent-ion, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, and to the letters and figures of referencemarked thereon, which forni a part of this specification.

My invention relates to certain new and useful improvements in theconstruction of boring-machines, and is especially designed as animprovement upon the Letters Patent granted to me August 7, 1885, N o.324,100.

This improvement consists, first, in the construction and arrangement ofa device for clamping the machine to the timber; second, in an improvedmeans of adjusting the oscillating cutters; third, in the arrangementand location and mode of driving the feedingscrew, and in theconstruction of the open nut for thesame; fourth, in the attachment of asuitable device for stopping the tool from cutting after a requireddepth of hole shall have been reached, all the other parts of themeehanism being constructed substantially the same as described in theabove-mentioned patent.

In the drawings, Figure 1 is a side View, partly sectional, of a machineembodying my invention. Fig. 2 is an end view of the same. Figs. 3, 4,and dare enlarged detached views of the open nut. Figs. 6 and 7 areenlarged views of a detached portion of the oscillating lever and wedgefor adjusting the same. Fig. Sis an enlarged view of the stop shown inFig. 2. Fig. 9 is a View of the under side of the frame,showing theclamping device. Figs. 10, 11, 12, and 13 are enlarged views of thecutter and a portion of the lever carrying the same. Fig. 14 is asection of the camplate. Fig. 15 is a View of the under side of thecam-plate, showing the bolts holding the plates rigid. Fig. 16 is a viewofthe same with the bolts withdrawn. Fig. 17 is a section of Fig. 15.Fig. 1S is a section of Fig. 16. Fig. 19 is a section at .fr fr, showingbolts holding the cam-plates rigid. Fig. 20 is the same, showing thebolts withdrawn for allow- Serial No. 178,306. (No model.)

ing the cam-plates to revolve with the boringtool.

a represents the bed-pieces of the machine, and b the vertical standardscarrying a gate, c, which is held in position by the hooked lugs d,which engage with suitable slides on the front edge of the standards b.The horizontal shaft j' is supported by the gate in proper boxes, andcarries the gear-wheel c on its central portion, while at the ends areprovided suitable cranks, g, with which to propel the machine. Avertical shaft, h, is placed in the central part Yof the gate c, andproperly secured in Vertical bearings, and to the lower end, below thegate, is the socketj, which is attached to the upper end of theboring-tool, and to the upper end of the shaft h is attached agear-wheel, '13, which intermeshes with the wheel e, the teeth in eachbeing placed slightly skewing or diagonal to allow a shaft, la, to passthe shaft f. rlhis shaft k is secured to or is an extension of the shaftl1', and is provided on its upper portion with a suitable screw-thread,which operates to propel the toolinto the timber. An open nut consistingof the levers s", which are placed with one end pivoted tothe under sideof the cross-piece y and,extending forward on opposite sides of the.screw It, is provided with recesses t, which are threaded to engagewith the screw k, and at their outer ends are pivoted the one to one endof the lever o and the other to one end of the strap a, the opposite endof the strap being also pivoted to the lever o,in the manner shown inFigs. 4.-, and 5, so that when the lever o" is placed in one positionthe nut will be closed upon and in engagement with the screw k,

and when in another position (shown in Fig. J

4) the levers s will be thrown apart and the screw will revolve withoutengagement, and be free to allow the tool to be withdrawn from the holewhich it has bored.

By forming the feeding-screw k" upon the upper portion ofthe shaft 7Lthe machine is rendered much more simple and complete than with theconstruction described in the IOO bottom thereof the outlets r, throughwhich the oil may pass, lubricating the feed-screw k, and, reaching thegear-wheel 1', it spreads out and lubricates the teeth of the wheels ande, and passing`below reaches the camplate q, where an Oilchamber, w,retains and conducts the lubricant to the cam-groove a", where therollers are lubricated, and the surplus oil follows the arms m andlubricates the lower portions ofthe boring-tool.

In order to make an adjustmeutfor the cutters n in a side directiomldivide the upwardextending arm of the lever m in the manner shown inFig. 6, the portion in carrying the roller p being secured to the part mby the bolts l, a slotted wedge, wffbeing placed between the parts m andm, and held in position by the bolts l passing through the slots o, sothat when the bolts are loosened t-he wedge will slide downward, lnovingthe part m outward to the required distance, when the bolts can beturned to hold the parts again firmly together. This adjustment of theparts m outward causes the cutter a to reach farther outward with a sidemovement, so that should the cutter become worn away on its side it canbe adjusted by the above means to cut the hole to the required size inone direction.

At the lower end of thelever m, and on the under side thereof, isprovided a chamber or recess,m,into which is placed the upward-extending shank a of the cutter n. Curved slots l are arranged in thelever m at the sides of the recess, into which rests the pivots i',which project from the sides of the shank n', and at the upper end ofthe shank n is arranged a slot, o', into which passes the rcduced parti" of the screw p', the shank n being recessed for receiving the head ofthe serewwhich is screwed into that portion of the lever beneath thereoessm, and by means of this screw p the shank n may be moved outwardor inward as required, and the pivots i', holding the center of the.cutter in rigid position, the shank a is tilted, and the cuttingedge isadjusted to reach forward as the c utter becomes worn away.

Through the bed -pieces a, and across the machine, is placed theguide-bara', having at its outer .end rigidly attached the clampingpieceb', whichr extends downward Vto a short distance below the bottom of thebed-pieces a,

'and is then turned inward and provided with a wedge-shaped end, c', tocatch into the timber, or with a turned end, d, which bears against theside of the timber. A clampingscrew, e', passes through the part b andthrough one of the bed-pieces a, a nut, g', being arranged in thebed-piece which engages with ascrew, a jam-nut, h', being placed on thescrew just inside of the piece b', and a crank, s', or a square head,t', is attached to theouter end ofthe screw with which to revolve thesame.

I place on one side ofthe machine two of the abovedescribed clampingdevices, having the clamping-pieces d extending below the bedpieces a,and on the other side one having the end c. The parts d' are adj ustedto bear against the timber when the boring-tool is m a properposition,and then the crank s 1s operated to force the part c into thetimber, the part c reahingiu and catching onto an irregular surface andrigidly holding the machine in position.

As shown in Figs. 2 and S,one of the stand-` ards I is provided withholes u', into one of which is passed the screw-threaded shank ar` of astop, c', a nut upon the shank holding it firmly in position, and anadjusting-screw, w, is passed through the outer portion of the stop insuch a manner that when the gate c travels downward one of theprojecting lugs d will -catch upon the end of the screw wand stop thedownward movement of the gate and boring-tool. The gear-wheel fuis thenmoved to engage with thc rack w, and the gate 1s raised to its'formerposition, so that several holes can be bored to the same depth into thetimber.

At the bottom or under side of thc gate c is arranged a rigid projectingplate, y', beneath which,with the shaft h passing through their centers,are placed the canrplates q and q', the plate q being provided on itsunder side with the groove a, and holes are provided through the plate 1,aud also through the camplates q and q, into which is passed the boltsu, the upper ends of which are secured to a cross-piece, d, and anupward-extending rod, j, is secured by its lower end to the crosspiece dand passes through a projecting part, c, of the gate c, and a spring, fis coiled around the rod f and arranged with its npper end bearingagainst the part c and its lower end bearing against the crosspiece d,so that the bolts u will be pushed into the holes in the cam-plates. Aprop, e, is pivoted to the cross-piece d, and arranged so that when in avertical position the end of the prop will bear upon the cam-plate j andlift the bolt u from engagement with the cam-plate q. and allow thecam-plate q to revolve with the boringtool,when a round hole will beproduced.

1. In a boring-machine, the combination, with the bed-pieces a, and aclampingarm, d', secured `to the bed-pieces, of a guide-bar, a, passedthrough the said bed-pieces, a clampingfpiece, b', attached to the outerend of the guide-bar and provided with an inward-extending end, c', aclampingscrew, e', paed through the said piece b', and provided withmeans of revolving the same, as described, a nut, g', upon the screw andsecured to the bedpiece a, all operating substantially as described, andfor the purpose set forth.

2. In a boring-machine, the combination, with the oscillating lever m,having at its 1ower end and .under side the chamber m', and recesses Zonthe sides of the chamber, of the cutter a, having the upward-extendingshank a', adapted to iit into the said chamber, the

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pins fi', projecting from the sides of the shank and resting in therecesses Z', a slot, o', in the upper end of the shank, and a screw, p',provided .with the groove r', resting in the slot o and passing into thelever m, substantially as and for the purpose set forth.

3. In a boringmachine, ahorizontal crankshaft and a vertical auger-shaftsituated in a different vertical plane from and geared to thecrank-shaft, and having its upper portion, k, extending above thecrank-shaft and provided wit-h a screw-thread, and the levers s",pivoted to the upper cross-piece, y, and extending on opposite sides ofthe shaft 7c, and provided with the screw-threaded recesses t, incombination with the lever o", pivoted by one end to the outer end ofone of the levers s, and the strap u, pivoted by one end to the lever oand by their opposite ends to the outer end of the other lever s,substantially as and for the purpose herein set forth.

4. In a boring-tool, the combination, with the lever m, of theupward-extending part m, secured to the upper part of the said lever bythe bolts l, and the adj usting-wedgea, placed between the said parts mand m, substantially as and i'or the purpose set forth.

5. In a boring-machine, the gate c, having the plate q rigidly attachedto the bottom part 3o thereof, and the cam-plate q, located just be- 6.In a boring-machine, the combination of 4o the cam plate q with an oilchamber, fw, formed in the upper side of the cam-plate and provided withopenings communicating with the cam-groove a,and adapted to receive thesurplus oil from the shaftabove and feed it to the cam-groove,substantially as and for the purpose specified.

7. In a boring-machine, the combination, with the feeding-screw la, ofan oil-chamber formed in the upward-extending end of the saidfeeding-screw and provided with outlets adapted to feed the oil to thescrew, ,substantiall y as and for the purpose specified.

In testimony whereof I aix my signature in presence of two witnesses.

JOHN ERNST.

Witnesses:

J. E. THoMAs, W. H. POWER.

